the way in which trade, industry, or money is organized, or the study of this

Their ideas sound fine in principle, but they haven't worked out the economics behind the policies. 他们的计划理论上听起来不错，但是他们没有搞清楚这些政策背后的经济因素。

She's in her third year of studying economics at York University. 她在约克大学主修经济学，现在上大三。